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PTFE AL_SHIMAA MOUSTAFA
SAMAH AHMED UNDER SUPERVISION : DR / WAEL ABD_ELMOEZ MEMBERS OF THE GROUP MINYA UNIVERSITY
FACULTY OF ENGINEERING
CHEMICAL ENGINEERING DEP. History and background
What is PTFE
Prices MAIN POINTS : HISTORY OF PTFE 1941 1946 Had been patented
& named Teflon Used in
making machine parts for military Used in many industrial application How was PTFE discovered ? chlorofluorocarbon tetrafluoroethylene new chlorofluorocarbon refrigerant PTFE CLASSIFICATION 1960 Accidentally discovered on April 6, 1938 by Roy Plunkett Reaction to stress and temperature Methods used for production Mechanical strength Molecular arrangement Type of mesomer involve in the polymer Morphology Properties of PTFE Density (g/cm3) : 2.15
Elongation at Break (%) : 400
Melting point : 326.8 °C
color : white
form : powder
Formula : (C2F4)n
IUPAC ID : poly(1,1,2,2-tetrafluoroethylene)
Stability : Stable - nonreactive with most materials Production CaF + H SO CaSO + 2 HF CHCl +2 HF CHFCL + CHF CL +CF CL + HCL 2 CHClF CF CF + 2 HCl It is thermoplastice Addition Linear Amorphous Elastomer Homopolymer Extreme temperature
resistance Low coefficient of friction Characteristics
of PTFE Resistant to
many chemicals Weather and UV resistance Hydrophopic Non adhesive Eq.1 Eq.2 H2SO4 CaF2 CH3OH CL2 SbCL5 (CAT.) 65 C Eq.3 ALCL3 (Cat.) Fractionation Scurb Pyrolysis
Pt (Cat.) Fractionatio Fractionation Scurb Dryer Batch
suspn H20 Dil HCl CHCL3 CF2CL2 H20 Dil HCL H20 80_240 C Filtered,extruded,etc
to granules PTFE disperation Filtered dryed and
ground to powder APPLICATION Space suite Pipe factories Sports Products kitchen Tools baby diapers Medical applications Cars Othe application 2CH OH + 3CL 2CH CL + 2H 0 + H 2HF + CHCL CHCLF + 2HCL SBCL 65 C CHF CL + CHCL HF ALCL (Cat.) (3a) Resistance to magnetic field Non-Flammable PRICES PTFE Powder PTFE Raw Material : Price: US $ 5.0-16.0 / Kilogram PTFE raw material used to produce ptfe tube: rice: US $ 7.5-8.5 / Kilogram Eq.(3a) PTFE contain
C C and C F
the polymer very stable
and very inert In The Name of Allah 2 2 4 4 3 2 3 2 2 3 2 3 2 2 2 2 3 5 2 3 2 2 2 Pt.(Cat.) 650-800 C PTFE recycled raw material:
Price: US $ 1-10 / Kilogram